Bertali's compositions are in the manner of other northern Italian composers of the time and include operas, oratorios, a large number of liturgical works, and chamber music. Particularly his operas are notable for establishing the tradition of Italian opera seria in Vienna. Approximately half of his output is now lost; copies survive made by Bertali's contemporary, Pavel Josef Vejvanovský, some of the pieces are currently in possession of Vienna's Hofbibliothek, the library of the Kremsmünster Abbey and the Kroměříž archive. The most important source for Bertali's work is, however, the Viennese Distinta Specificatione catalogue, which lists several composers of the Habsburg court and provides titles and scoring for more than 2000 compositions.